They are among 37 players in the latest suit, filed Aug. 1 in the U.S. District Court in Houston by Beaumont firm Provost Umphrey. An estimated 2,500 former players are named in 135 lawsuits, according to NFLconcussionlitigation.com. Twenty-four have known Southeast Texas ties.

Farr and Mullin each suffer from "various neurological conditions and symptoms related to multiple head traumas," according to court document.

Farr, 69, played cornerback in the NFL from 1965 to 1973 for five teams, including the Houston Oilers. He lives with his wife Mary in Houston.

Mullin, 47, played from 1988 to 1990 for two teams, including the Dallas Cowboys. He lives in Orange.

Here is a list of former players with known Southeast Texas ties who have sued the league: